From their Windy City roots through their rise to the top of the charts, Chicago's success is legendary. Find out how this "rock and roll band with horns" became one of the best-selling groups of all time in CNN Films' "Now More Than Ever: The History of Chicago."

It was the late '60s and Jimi Hendrix had just watched a set by a young band called Chicago Transit Authority. "Your guitar player is better than me," he said. Sadly, tragedy cut short the promising career of Terry Kath.